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What is the difference between “long”, “long long”, “long int”, and “long long int” in C++?
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long and long int are identical. So are long long and long long int. In both cases, the int is optional.
As to the difference between the two sets, the C++ standard mandates minimum ranges for each, and that long long is at least as wide as long.
The ...
How to Customize a Progress Bar In Android
...set the progressDrawable property in customprogressbar.xml (drawable)
You can do this in the XML file or in the Activity (at run time).
Do the following in your XML:
<ProgressBar
android:id="@+id/progressBar1"
style="?android:attr/progressBarStyleHorizontal"
android:progressDrawabl...
Conditional Variable vs Semaphore
...e that a piece of code is atomic, put a lock around it. You could theoretically use a binary semaphore to do this, but that's a special case.
Semaphores and condition variables build on top of the mutual exclusion provide by locks and are used for providing synchronized access to shared resources....
Symbolicating iPhone App Crash Reports
I'm looking to try and symbolicate my iPhone app's crash reports.
25 Answers
25
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CSS z-index paradox flower
I would like to create a paradoxical effect via the z-index CSS property.
6 Answers
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When should I use the new keyword in C++?
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Method 1 (using new)
Allocates memory for the object on the free store (This is frequently the same thing as the heap)
Requires you to explicitly delete your object later. (If you don't delete it, you could create a memory leak)
Memory stays alloca...
Why does modern Perl avoid UTF-8 by default?
...din, stdout, and stderr to UTF‑8. Both these are global effects, not lexical ones.
At the top of your source file (program, module, library, dohickey), prominently assert that you are running perl version 5.12 or better via:
use v5.12; # minimal for unicode string feature
use v5.14; # optimal f...
What is the difference between `sorted(list)` vs `list.sort()`?
...iterable, not a list yet.
For lists, list.sort() is faster than sorted() because it doesn't have to create a copy. For any other iterable, you have no choice.
No, you cannot retrieve the original positions. Once you called list.sort() the original order is gone.
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Backing beans (@ManagedBean) or CDI Beans (@Named)?
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CDI is preferred over plain JSF because CDI allows for JavaEE-wide dependency injection. You can also inject POJOs and let them be managed. With JSF you can only inject a subset of what you can with CDI.
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conditional unique constraint
... message I get. Nota bene, in my implementation, I merely ensure that you cannot add a second item with the same Id which is active if there is already one active one. You could modify the logic such that if there is an active one, you cannot add any item with the same id. With this pattern, the ...